<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    a {
      display: block;
      width: 100px;
      height: 100px;
      -webkit-tap-highlight-color: transparent;
      -webkit-tap-highlight-color: rgba(0,0,0,0);
    }


    a,button,input,textarea{
      -webkit-tap-highlight-color: rgba(0,0,0,0);
      -webkit-user-modify:read-write-plaintext-only; 
  }
  </style>
</head>
<body>
  <a href="#">连接</a>
</body>
</html>